Arago wields the power of Brionac, one of th Erinn's treasures. While not knowing the full extent of his powers he came to the conclusion: "...I've gradually come to this power a little better. I can use it for spotting ghost, catching falling lifts and stopping blows......". He thinks that this "cursed power" reacts to anything living stealing away the light that represents their life because anything apart from plastic or metal that come in direct contact with his body rots, withers or gets altered somehow. However during his battle with Orc, he reveals that the power of Brionac isn't a life-draining but a life-giving one. It is also called the Radiance of Life. Every time he touches something that radiance increases the body's vital process resulting in rapid healing. However if the body's recovery limits is reached it will begin to take damage. " Just like how the roots of a plant will rot if they're over fertilised. Too much is deadly."

Arago's Offensive abilities utilising Brionac can be split into three main categories: Firing, Striking, and Grabbing .

Arago curves beam "Firing"

"Firing" involves Arago quite literaly firing "beams" of raw life energy from his hands; this has mainly destructive uses, as shown against various monsters such as the Nuckelave and the Golem. The beams themselves apparently appear to have a rainbow coloring, as noted by seth

Arago vs Wolfman, "Striking"

"Striking" is Arago's main offense so far in the story; he uses the overflowing life energy provided by Brionac to enhance his physical strength to superhuman levels, forming fist of raw energy aroundhis own fist as he attacks; this allows him to shatter boulders and easily match strength of superhuman;y strong adversaries such as the Wolfman and fight on equal terms.

Arago grabs Billion of acceterated water droplets and forms a water sphere from them

"Grabbing" Arago uses less frequently as an offensive tactic, but uses it as a finishing move to spirits or other beings with corporeal form; its main use is burning the opponent as the life energy overflows into whatever Arago is grabbing (which he tends to do with his right arm) which causes overly rapid healing which leads to burns and malformed skin ( and damage in general, as the body can't take that amount of energy overloads). Later on in the story Arago uses to block against a hail of accelerated water and to form the water into a ball.

I'm quite partial to Shiki of Lunar Legend Tsukihime. He can see the threads of life in everything around him, from plants to chairs to people. By cutting these lines with his trusty pocketknife, he can score an instant kill on that thing.